mirror of https://github.com/cc65/cc65.git
69 lines
1.3 KiB
C
69 lines
1.3 KiB
C
/*
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** Ullrich von Bassewitz, 11.08.1998
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**
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** char* fgets (char* s, int size, FILE* f);
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*/
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#include <stdio.h>
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#include <errno.h>
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#include "_file.h"
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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char* __fastcall__ fgets (char* s, unsigned size, register FILE* f)
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{
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register char* p = s;
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unsigned i;
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int c;
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if (size == 0) {
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/* Invalid size */
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return (char*) _seterrno (EINVAL);
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}
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/* Read input */
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i = 0;
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while (--size) {
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/* Get next character */
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if ((c = fgetc (f)) == EOF) {
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/* Error or EOF */
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if ((f->f_flags & _FERROR) != 0 || i == 0) {
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/* ERROR or EOF on first char */
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*p = '\0';
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return 0;
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} else {
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/* EOF with data already read */
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break;
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}
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}
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/* One char more */
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*p = c;
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++p;
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++i;
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/* Stop at end of line */
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if ((char)c == '\n') {
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break;
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}
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}
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/* Terminate the string */
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*p = '\0';
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/* Done */
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return s;
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}
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